- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367817 > PCF84C81A (NXP Semiconductors N.V.) 8-BIT SINGLE CHIP MICROCONTROLLERS PDF資料下載
參數(shù)資料
| 型號(hào)： | PCF84C81A |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT SINGLE CHIP MICROCONTROLLERS |
| 中文描述： | 8位單晶片微控制器 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 145K |
| 代理商： | PCF84C81A |
Philips Semiconductors
The I
2
C serial bus: theory and practical consideration using Philips
low-voltage PCF84Cxx and PCD33xx
μ
C families
Application note
AN168
1988 Dec
9
PIN
&
ACK
RECEIVED
INITIALIZE
BUS
STATUS
LOAD S0 WITH SLAVE
ADDRESS AND RD/WR BIT
START CONDITION
AND TRANSMIT ADDRESS
RETURN
GENERATE
STOP CONDITION
SEND/RECEIVE
DATA BYTE
YES
NO
NO
YES
PIN
&
ACK
RECEIVED
GENERATE
STOP
CONDITION
COMMUNICATION WITH PERIPHERAL REQUIRED
SL00952
Figure 6. Flowchart for Reading/Writing One Byte to an I
2
C
Peripheral; Single-Master, Single-Address Slave
MOV S1, #18H
:Initialize bus-status register
:Master, Transmitter,
:Bus-not-Busy, Enable SIO,
:Load S0 with RAM’s chip
:address
:Start cond. and transmit
:address
:Wait until address received
:Set up for transmitting RAM
:location address
:Transmit first RAM address
:Wait
:Set up for a repeated Start
:condition
:Get RAM chip address & RD bit
:Send out to bus
:preceded by repeated Start
MOV S0, #0A0H
MOV S1, #0F8H
CALL ACKWT
MOV A, #00H
MOV S0,A
CALL ACKWT
MOV S1, #18H
MOV A, #0A1H
MOV SO, A
MOV S1, #0F8H
CALL ACKWT
MOV A,S0
CALL ACKWT
MOV A,S0
:Wait
:First data byte to S0
:Wait
:Second data byte to S0
:And First data byte to Acc.
:Wait
:Save first byte in R0
:Third data byte to S0
:and second data byte to Acc.
:Wait
:Save second data byte
:in R1
:Leave ack. mode
:Bit Counter=001 for neg ack.
:Third data byte to acc
:negative ack. generated
:Save third data byte in R2
:Get bus status
:Wait until transfer complete
:Stop condition
:Restore acknowledge mode
CALL ACKWT
MOV R0,A
MOV A,S0
CALL ACKWT
MOV R1,A
MOV S2, #01H
MOV A,S0
MOV R2,A
MOV A,S1
JB4 WAIT1
MOV S1, #0D8H
MOV S2, #41H
WAIT1:
SL00953
Figure 7.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCF84C822 | 8-BIT SINGLE CHIP MICROCONTROLLERS |
| PCF84C846 | 8-BIT SINGLE CHIP MICROCONTROLLERS |
| PCF84C84x | 8-BIT SINGLE CHIP MICROCONTROLLERS |
| PCF84C22AP | 8-bit microcontrollers |
| PCF84C22A | 8-bit microcontrollers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF84C81AP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Telecom microcontroller |
| PCF84C81AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Telecom microcontroller |
| PCF84C81PN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| PCF84C853AT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| PCF84C85A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontroller with extended I/O |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。